Identify the differences between bacteria, archaea, and eukarya, and the evolutionary relationships between the 3 groups

Explanation:

Archaea, Eubacteria and Eukarya are three or Eukaryota are the three domains classified by Carl Woese (1977). In the earlier systems of classifications, Archaea were included in the Kingdom Monera along with true bacteria (Eubacteria) and Cyanobacteria (blue-green algae) based on some similarities such as they both are prokaryotes.

But now it is certain that Archaea possess distinct difference from eubacteria in their cellular structures such as archaea to have only one type of RNA polymerase enzyme whereas, eubacteria possess several types of RNA polymerase enzyme and metabolic activities. Eukarya are eukaryotes having true nucleus. Archaea have a unique and separate evolutionary ancestry as well.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.